Assessing the history of trace metal (Cu, Zn, Pb) contamination in the North Sea through laser ablation : ICP-MS of horse mussel Modiolus modiolus shells
Assessing the history of trace metal (Cu, Zn, Pb) contamination in the North Sea through laser ablation : ICP-MS of horse mussel Modiolus modiolus shells
复制标题
通过激光烧蚀评估北海微量金属（铜、锌、铅）污染的历史：马贻贝 Modiolus modiolus 壳的 ICP-MS
DOI：
10.3354/meps211157
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发表时间：
2001
影响因子：
2.5
通讯作者：
J. Cook
中科院分区：
文献类型：
--
作者：
C. Richardson;S. Chenery;J. Cook
采用激光烧蚀电感耦合等离子体质谱法（LA-ICP-MS）测定了长寿（-35岁）马贻贝（Modiolus Modiolus）壳中增量生长记录的元素组成。1984年从北海南部两个地点收集的贝壳中测定了污染金属Cu、Pb和Zn的浓度，一个是“受影响的垃圾场”，另一个是远离已知点源输入的“控制”地点。每个壳的年龄确定年度增长模式的行出现在薄壳部分,和每一个增长线被分配一个日期,从而允许每年这些元素的浓度,使用介绍,金属的浓度测定在5复制激光消融(大小∼100 x 200μm),从个人夏季和冬季生长线沿着每个3壳的垃圾场和3壳从控制的网站。年龄（年）对两个地点的壳中Cu、Pb和Zn的浓度均有显著影响，且随时间变化。冬、夏两季对壳中Pb、Zn含量的影响不显著；铜的季节性掺入差异不显著。排土场壳中3种金属的浓度均显著高于对照场壳。对两个地点贝壳中金属对的Pearson相关系数测定表明，在贻贝生命的某些时期，倾倒地点贝壳中金属浓度的显著正相关性高于对照贝壳。1968 ~ 1974年垃圾场壳中Cu、Zn、Pb含量显著高于1975 ~ 1979年。在对照区，虽然Pb和Zn在同一时期显著下降，但浓度显著低于排土场。《海上倾倒法》（1974年）的实施以及随后北海倾倒量的减少可能导致受影响倾倒地点的贝壳中金属浓度的降低。
Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was used to determine the elemental composition of the incremental growth record in the shells of longevous, (-35 yr old) horse mussels Modiolus modiolus. Concentrations of the contaminant metals Cu, Pb and Zn were determined from shells collected in 1984 from 2 sites in the southern North Sea, an 'impacted dump' site and a 'control' site distant from known point source inputs. The age of each shell was determined from the pattern of annual growth lines present in thin shell sections, and each growth line was assigned a date, thus allowing annual concentrations of these elements to be determined, Using LA-ICP-MS, concentrations of the metals were determined in 5 replicate laser ablations (size ∼100 x 200 μm), from individual summer and winter growth lines along the length of each of 3 shells from the dump site and 3 shells from the control site. A significant effect of age (year) on Cu, Pb and Zn concentrations in the shells from both sites was apparent, indicating changing concentrations with time. Significant seasonal (summer/winter) effects were only obvious in the concentrations of Pb and Zn in the shells; a non-significant difference in seasonal incorporation of Cu was observed. Concentrations of all 3 metals were significantly elevated in the dump site shells compared with the control site shells. Pearson correlation coefficients, determined for pairs of metals in the shells from both sites, indicated a higher number of significant positive correlations in the concentrations amongst the metals in the dump site shells than in the control shells during certain periods of the mussels' life. Levels of Cu, Zn and Pb were significantly higher in the dump site shells between 1968 and 1974 than in the period from 1975 to 1979. In the control site shells, although Pb and Zn significantly declined during the same periods, the concentrations were substantially and significantly lower than in the dump site shells. The implementation of the Dumping at Sea Act (in 1974) and the subsequent decline in dumping in the North Sea may have resulted in a decrease in the concentration of metals in the shells from the impacted dump site.